Scraper for ditching machines



MarchlO, 1931. H. H. BARBER SGRAPER FOR DITCHING MACHINES Filed Aug. 21, '1928 2 Sheets-Sheet l 1 LIL March 1o, 1931.

H. H. BARBER SCRAPER FOR DITCHING MACHINES Filed Aug. 21,'1928 2 Sheets-Sheet 2 v .TTL/n DI Harfy/'arer Patented Mar. 10, 1931 4UNITED STATES PATENT OFFICE HARRY H. BARBER, F AURORA, LLINOIS, ASSIGNOR TO BARBER-GREENE COMPANY,

OF AURORA, ILLINOIS, A CORPORATION OF LLINOIS SCRAPER FOR DETGHNG MACHINES Application led August 21, 1928. Serial No. 301,026.

This invention relates to a scraper for ditching machines. t u

It is an object of this invention to provide a scraper which can be elevated for passing I lwhen post holes or the like are dug.

It is also an object of this invention to employ safety means that Vwill give or fracture when the s craperencounters an overload or obstruction.

*' The invention comprises the novel structure and combination of parts hereinafter described and more particularly pointed out Yand defined in the Aappended claims.

'In thek accompanying drawings which illustrate a preferred form of this invention, and

` in which similar reference numerals refer to similar features inthe different views.

Figure 1 is a fragmentary side elevational view of ditching machine equipped with a scraperl involving this invention.

Figure .2 is an enlarged elevational view of the scraper and the structure above 'said scraper illustrating in dotted lines its removed position.

, Figure 3 is a fragmentary top plan view fof the mechanism shown in` Figure 2.

vvFigure 4 is a reduced fragmentary elevay tional view upon the-line IV-IV of Figure 2 looking 'in the direction of the arrows.

Figure 5 is an enlargedfront elevational view of thescraper. *A

Figure 6 is a sectional view upon the line VI-VI of Figure 5. v

Figure 7 is an enlarged sectional view upon the linev VII-VII of' Figure 4.

Figure 8 is a sectional view upon the line VIII-'VIII of Figure 2.

Figure 9 is' a'fragmentary planview illustrating the locking plate for the connecting rod of the telescopic sections of a part of the scraper support.

In the drawings, certain parts of a ditching machine have been illustrated in order that the relation of the present invention thereto may be more readily understood. The numeral l represents a vertical boom that is supported upon a crawler by the radius rods 2. The boom 1 carries a frame for supporting the cross conveyor. The particular structure of this frame is immaterial from the standpoint of this invention, and only certain elements thereof need be mentioned. These elements are the transverse parallel beams or bars 3,' only one of which is shown, and the upright elements Il.

The frame 'elements 3 suspend a support for a scraper, and this support is shown as of triangular' form consisting of the vertical legs 5 which are pivoted to gusset plates 6 secured to one end of the frame elements 3, and diagonal legs 7 which are removably secured to the other ends of the frame elements 3 in a manner that will now be set forth. A gusset plate 8 (Figure 8), is provided with attaching flanges 9 which are secured to the elements 3, which gusset plate 8 is reinforced by a channel or angular section 10. A channel section 11 is secured to the gusset plate 8 by means of two frangible pins or bolts 11a. The upper ends of the legs 7 of the scraper support are spanned by a channel member 12 to which angle clips 13 are secured, and which angle clips are adapted for removable attachment to the flanges of channel 11 by a frangible bolt 39 as shown in Figure 8. The channel section 12 is preferably connected to the legs 7 by means of small angular pieces 14 which are secured by bolts or rivets 15.

The legs 5 of the scraper support are made of telescopic sections 5a and 5b. The section members 5a are in the form of angle bars to which a separator bar 16 is secured. The lower section members 5b are in the form of strips which overlap the upper section members, and are suspended therefrom by a removable locking bolt 17 having a handle '18 extending at right angles thereto.

Mechanism has been provided for maintaining the telescopic sections 5a and 5b in` lOG substantial alignment,V To'this end, a terminally flanged strip 19 is attached to the section membersla .by angle clips Y2O. Tlhe terminal flanges 19a thereof overlap the sec tions b and confine the'samefagainst the flanges ofthe angle members 5a that are parf allel thereto as shown in Figure' 7. A' stop .member 21 is secured to one of the sectionV ymembers 5a above the strip 19 with which it is adapted to abut lwhen the parts are in op'- erative position as shown in full lines inthe drawings. Upon the other section member 5a there is secured a locking plate 22 which has an upwardly directed` narrow portion or projection 23 (Figure 9,) that overlaps the handle l8 of the lo'cki'i'g bolt l7-witl`1 the result that the `handle 18 must firstA be rotated from undersaid extension before the bolt caribe-withdrawn. K Y v Q The lower ends of the legs 7 are pivoted to-'the lower ends of the legs 5 as indicated at'2l. The legs7 carry the scraper 25 which isada'pted to travel behind the digging boomV for cleaning up the dug trench. .This scraper y is sli'dab'ly 'mountedupon the legs 7 of the scraper support as will now be set forth.

Extending along the marginsof the front face of the lscraper aire metal strips 25a which are attached to the scraper. Suitable guides -26- are carried by these strips for receiving Vthe legs 7 as shown in Figures 5' and 6.'y The back of the scraper is reinforcedby angle 'strips 28 and flexible sweep strips` '29 of rubber or the'likev are attached in superp'osed l Vrelation upon the attaching flanges ofthe reyinfo'rcing angles 28, by bolts 27 'which extend through the strips 25a`and sec'urethe'- rein- :forcingangles,which are also-secured by the -fraine where it is trained around a drunu'31 andffastened thereto. Thedrurn 31 is' Vsecured to a shaft 32fjour'nall'ed in suitable bearings upon the frame. A gear 33 secured upon the shaft 32 is driven by a'small gear v34 secured upon a shaft35 journalled in the bearings upon thefframe. A pulley 36 is secured upon the shaft and an endless cable 37 is tra-ined overthis pulley. The ca-V ble 37 is adapted to be manually operated for rotating the shaft 35 and winding the cable 30 upon the drum 3l when the scraper or thel scraper support is elevated. The cable 37 which isv in the 'formof a chain is adapted 'to ybeattached to a hook e0' (Figure l) or the like to anchorrthesame against movef VThe aforementioned'vanglefclips the bridge piece"12eXtend above the top of the v legs 7 andl a safety cable 38 connects the angle extensions with the frame, so that the scraper rmay be supported thereby when the frangible connections break.

In use, the scraper normally occupies the position shown in full lines in the'drawings. Now if aniV obstruction such as a service pipe should be encountered, the cable 37 may be operated for elevating the scraper upon its support. Y l v y v The scraperand its support may also be elevated into the dotted line position shown- ,in FigureV 2, in the following manner:

The scraper. is elevated by Winding the cable 30 uponl its drum by pulling upon the`v` cable 37 until the lower guidesrof the scraper strike the stops 7a'.- The connecting pinsT 17 f and 39 are then removed and the safety ca- Y ble 38 isunho'oked from the scraper support.

rlChe hoisting operation effected by pulling` upon the cable'37 is-then continued with thek result that vthe leg sections 56 will@ slide upf ward upon the sections 5a until :the former are in complete telescopic relation withv the latter. The two sections in such telescopic relation willthen swing upon the pivots-'of thev upper sections 5a into a horizon-tal. plane beneath the frame-'members .31 as lshown in dotted lines in Figure 2, and-*the legs-7 car-VL rying the scraper will be elevated in vertical `position vagainst theouter Vvertical face lof the fra-me asfshown'in dotted lines: 1nthis position the cooperating chain 37 rn'ay be at-` tachedto they hook l0v to maintain the .par-ts in .elevated position. reversevoperation will bring the part-sto their operative position.

If, during the use ofthe ditching machine,

Van"obstruction Yof suicient magnitude should be encountered by the scraper, the frangible'k- `pin 39 would b e'br'oken and the scraperwould be supported by the safety chain 38;V v. If the strength ofthe frangiblebolt 39 should eX-V Y cee'd thatV of the frangible bolts 11-a,the latter would be the first to break upon vover-- load. However, it is more desirable to'usey a frangible bolt v39 that is weaker than the combinedfrangible bolts 11a since'ythe frangible bolt l39 may be more readilyrreplaced.

From the foregoing, it will be 'apparent that a verysimple support and hoisting mechanisrn for a scraper has .been provided which allows the'scraper tobe elevatedfor' passing over an obstruction and' which allows'the scraperV and its support to be elevated when w it is desired to dig post holes, or whenitis desired to dig adjacentV a curbing Aor sidewalk. f5

I ain aware that many changesniay be made, and numerous details of construction may be `Vvaried `through a wide range without departing from the principles of this invention, and,'l thereforddo not purposeV limiting, the 4patent granted hereon, other-V wise than necessitatedby' the prior art;`

I claim as my. invention: l. In a ditching machine embodying a lframe, a scraper support lmounted upon said said support comprising a pair of slidably v' adjustably pendant members pivoted to said frame, and a pendantmember removably secured to said frame, a scraper slidably mounted upon said support, and hoisting mechanism for elevating said scraper, slidably adjusting said pair of members and swinging the same into horizontal position and elevating the other member.-

4. In a ditching machine lembodying a frame, a scraper support comprising a member pivotally secured to said frame and a member removably secured to said frame, and hoisting mechanism for swinging said support upon the pivotal connection of the first member when the removably secured member is released.

5. In a ditching machine, a supportingv frame member, a depending member pivoted to said frame member, a second depending member pivoted at its lower end to said first member and removably secured to said frame member, and a scraper on said second member, hoisting mechanism for swinging said first member upon its pivot when the second member is released from the frame member. 6. In a ditching machine embodying frame members, a scraper support having pivotal connection with said frame members, and removable connection with said frame members, and hoisting mechanism for swinging said support upon its pivotal connection when said removable connection is removed.

v 7. In a ditching machinea frame member,

' a scraper support comprising a contractile member pivoted to saidl frame member, and a member removably secured to said frame member, a scraper slidably attached to said second member, and hoisting mechanism for elevating said scraper, contracting said first memberand elevating said support when said second metioned member is released from said frame member. 8. In a ditching machine embodying a frame member, a contractablev scraper support depending from said frame, a scraper vslidably mounted upon said support, and

means for sliding said scraper upon said support, contracting said support and elevating the same.

9. In a ditching machine embodying a. frame member, a scraper support having pivotal connection with said frame member and also a frangible connection therewith, and a ysafety connection for supporting said scraper support when said frangible connection fails.

l0. In a ditching machine embodying a frame member, a scraper support having a pivotal connection with said frame member, and also a frangible connection therewith, and means for sustaining said support if the frangible connection fails.

11. In a ditching machine embodying a frame member, a scraper support consisting of a pair of pivotally connected elements, one element being pivotally connected to said frame member and the other element being removably secured thereto whereby the first element may be swung into horizontal position and the other into vertical position when said removably secured element is released.

12. In a ditching machine embodying a frame member, a scraper support comprising a pair of elements secured to said frame member for forming a rigid support, one of said elements being releasable from said frame member whereby said scraper support may be deformed, and means for elevating and simultaneously deforming said support.

In testimony whereof, I have hereunto subscribed my name.

HARRY H. BARBER. 

